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opticalengineering.spiedigitallibrary.org screenshot

Report Summary

  • 35

    Performance

    Renders faster than
    55% of other websites

  • 81

    Accessibility

    Visual factors better than
    that of 52% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 85

    SEO

    Google-friendlier than
    56% of websites

opticalengineering.spiedigitallibrary.org

Optical Engineering

Page Load Speed

1.4 sec in total

First Response

16 ms

Resources Loaded

1.1 sec

Page Rendered

215 ms

opticalengineering.spiedigitallibrary.org screenshot

About Website

Welcome to opticalengineering.spiedigitallibrary.org homepage info - get ready to check Optical Engineering Spiedigitallibrary best content for China right away, or after learning these important things about opticalengineering.spiedigitallibrary.org

<i>Optical Engineering</i> (OE) publishes peer-reviewed papers reporting on research, development, and applications of optics, photonics, and imaging science and engineering.

Visit opticalengineering.spiedigitallibrary.org

Key Findings

We analyzed Opticalengineering.spiedigitallibrary.org page load time and found that the first response time was 16 ms and then it took 1.4 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.

Performance Metrics

opticalengineering.spiedigitallibrary.org performance score

35

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.5 s

1/100

10%

LCP (Largest Contentful Paint)

Value8.7 s

1/100

25%

SI (Speed Index)

Value22.8 s

0/100

10%

TBT (Total Blocking Time)

Value460 ms

61/100

30%

CLS (Cumulative Layout Shift)

Value0.01

100/100

15%

TTI (Time to Interactive)

Value12.2 s

15/100

10%

Network Requests Diagram

opticalengineering.spiedigitallibrary.org

16 ms

journal.aspx

120 ms

1094514084.js

117 ms

22 ms

journal.less

20 ms

Our browser made a total of 41 requests to load all elements on the main page. We found that 85% of them (35 requests) were addressed to the original Opticalengineering.spiedigitallibrary.org, 5% (2 requests) were made to Google-analytics.com and 5% (2 requests) were made to Datacoll.spie.org. The less responsive or slowest element that took the longest time to load (798 ms) belongs to the original domain Opticalengineering.spiedigitallibrary.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 272.5 kB (55%)

Content Size

495.8 kB

After Optimization

223.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Opticalengineering.spiedigitallibrary.org main page is 495.8 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 35% of websites need less resources to load. Javascripts take 223.2 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 73.2 kB

  • Original 90.0 kB
  • After minification 76.2 kB
  • After compression 16.8 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 13.8 kB, which is 15% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 73.2 kB or 81% of the original size.

Image Optimization

-9%

Potential reduce by 10.7 kB

  • Original 117.9 kB
  • After minification 107.3 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Optical Engineering Spiedigitallibrary images are well optimized though.

JavaScript Optimization

-62%

Potential reduce by 137.4 kB

  • Original 223.2 kB
  • After minification 211.0 kB
  • After compression 85.8 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 137.4 kB or 62% of the original size.

CSS Optimization

-79%

Potential reduce by 51.2 kB

  • Original 64.6 kB
  • After minification 64.5 kB
  • After compression 13.4 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Opticalengineering.spiedigitallibrary.org needs all CSS files to be minified and compressed as it can save up to 51.2 kB or 79% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (46%)

Requests Now

24

After Optimization

13

  • Images
  • JavaScript
  • CSS

The browser has sent 24 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Optical Engineering Spiedigitallibrary. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

opticalengineering.spiedigitallibrary.org

opticalengineering.spiedigitallibrary.org

16 ms

journal.aspx

journal.aspx

120 ms

1094514084.js

1094514084.js

117 ms

22 ms

journal.less

journal.less

20 ms

institutionalLogo.css

institutionalLogo.css

15 ms

jquery.min.js

jquery.min.js

32 ms

WebResource.axd

WebResource.axd

16 ms

signInDialogs.js

signInDialogs.js

15 ms

WebResource.axd

WebResource.axd

19 ms

ScriptResource.axd

ScriptResource.axd

21 ms

ScriptResource.axd

ScriptResource.axd

47 ms

ScriptResource.axd

ScriptResource.axd

37 ms

67 ms

webtrends.js

webtrends.js

25 ms

ga.js

ga.js

43 ms

logo_SPIE_masthead.png

logo_SPIE_masthead.png

31 ms

wtid.js

wtid.js

163 ms

sprite_globalHeader.png

sprite_globalHeader.png

60 ms

logo_SPIE_DL_masthead.png

logo_SPIE_DL_masthead.png

60 ms

icon_search.png

icon_search.png

61 ms

coversmall_OPTICE.png

coversmall_OPTICE.png

61 ms

img_divider_med.png

img_divider_med.png

60 ms

OE-Feb-1.jpg

OE-Feb-1.jpg

798 ms

OE-Feb-2.jpg

OE-Feb-2.jpg

599 ms

Open%20Access.jpg

Open%20Access.jpg

790 ms

Michael%20Eismann.jpg

Michael%20Eismann.jpg

601 ms

img_submitpaper.jpg

img_submitpaper.jpg

157 ms

Cross%20Check.JPG

Cross%20Check.JPG

784 ms

counter_compliant.png

counter_compliant.png

196 ms

citation_linking_graphic.png

citation_linking_graphic.png

372 ms

logo_SPIE_footer.png

logo_SPIE_footer.png

380 ms

logo_silverchair_footer.png

logo_silverchair_footer.png

392 ms

b_question.png

b_question.png

401 ms

200D9C_5_0.woff

200D9C_5_0.woff

410 ms

__utm.gif

__utm.gif

26 ms

200D9C_3_0.woff

200D9C_3_0.woff

363 ms

200D9C_B_0.woff

200D9C_B_0.woff

375 ms

200D9C_2_0.woff

200D9C_2_0.woff

382 ms

b_resize.gif

b_resize.gif

391 ms

dcs.gif

dcs.gif

154 ms

Accessibility Review

opticalengineering.spiedigitallibrary.org accessibility score

81

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

ARIA IDs are not unique

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

opticalengineering.spiedigitallibrary.org best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

opticalengineering.spiedigitallibrary.org SEO score

85

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Opticalengineering.spiedigitallibrary.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Opticalengineering.spiedigitallibrary.org main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

opticalengineering.spiedigitallibrary.org

Open Graph description is not detected on the main page of Optical Engineering Spiedigitallibrary. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: